My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SS1F4-M3/I
- Part No.:
- SS1F4-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- DO-219AB
- Datasheet:
-
SS1F4-M3/I.pdf
- Description:
- DIODE SCHOTTKY 40V 1A DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,287
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SS1F4-M3/I from Vishay General Semiconductor is a surface-mount Schottky barrier rectifier in the eSMP® Series, configured as a single diode with 40 V reverse voltage rating, 1.0 A average forward current, and 0.37 V forward voltage at 1.0 A and 125 °C - used for polarity protection and freewheeling in DC/DC converters.
For engineers reviewing the SS1F4-M3/I datasheet, SS1F4-M3/I pinout, SS1F4-M3/I application, or SS1F4-M3/I equivalent, key selection factors include its low VF (0.37 V @ 125 °C), AEC-Q101-qualified variant availability, SOD-123W-compatible SMF (DO-219AB) package, and 125 °C/W junction-to-ambient thermal resistance on FR4 PCB.
Technical Context
The SS1F4-M3/I implements a planar Schottky junction optimized for high-frequency switching in power conversion circuits. It delivers low conduction loss via 0.37 V VF at 1.0 A and 125 °C, and supports surge currents up to 40 A (8.3 ms half-sine) without thermal runaway.
Its SMF (DO-219AB) package features matte tin-plated terminals compliant with J-STD-002 and JESD 22-B102, meets MSL Level 1 per J-STD-020, and achieves UL 94 V-0 flammability rating - enabling wave and reflow soldering in automotive and industrial assembly lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - maximum repetitive reverse voltage before breakdown; sets safe operating limit in polarity protection and flyback clamp applications |
| IF(AV) | 1.0 A - average forward current under specified thermal conditions; defines continuous DC load capability on standard FR4 layout |
| VF @ 1.0 A, 125 °C | 0.37 V - low forward drop reduces conduction loss and self-heating in high-duty-cycle DC/DC stages |
| IFSM | 40 A - peak surge current handling for transient energy absorption during startup or fault events |
| TJ max (DC) | 175 °C - maximum junction temperature under DC forward bias; enables operation in under-hood automotive environments |
| RθJA | 125 °C/W - thermal resistance from junction to ambient on standard FR4 footprint; informs heatsinking requirements |
| CJ @ 4 V, 1 MHz | 85 pF - low junction capacitance minimizes switching losses and EMI in high-frequency inverters |
Pinout & Package
Package: SMF (DO-219AB), low-profile surface-mount case compatible with SOD-123W footprint; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of circuit; accepts input current during forward conduction |
| Cathode | Forward current exit point / reverse voltage blocking terminal | Marked with color band; ties to higher-potential rail in polarity protection; blocks reverse leakage up to 40 V |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 0.37 V at 1.0 A and 125 °C - directly reduces power dissipation and improves efficiency in compact DC/DC modules |
| AEC-Q101 qualification option | Available as SS1F4HM3/I - validated for automotive-grade reliability including temperature cycling and humidity testing |
| MSL Level 1 moisture sensitivity | Rated per J-STD-020 - allows unlimited floor life and eliminates bake requirements prior to reflow |
| Halogen-free & RoHS-compliant | M3 suffix indicates compliance with environmental directives and JEDEC JESD201 Class 2 whisker resistance |
| UL 94 V-0 molding compound | Flame-retardant encapsulation - satisfies safety requirements for industrial and transportation end equipment |
Applications
| Automotive Polarity Protection | Industrial DC/DC Converter Output Rectification |
|---|---|
Use Scenario: Prevents damage from reverse battery connection in vehicle infotainment and body control modules. IC Role / Device Role / Timing Role: Schottky rectifier placed in series with power input; conducts only when anode is more negative than cathode. Use Value: 0.37 V VF at 125 °C limits heat generation under sustained load, while 40 V VRRM covers 24 V system transients. | Use Scenario: Freewheeling path in synchronous buck converter output stage for factory automation controllers. IC Role / Device Role / Timing Role: Uncontrolled rectifier providing low-loss return path during high-side switch off-time. Use Value: 85 pF junction capacitance minimizes reverse recovery noise and EMI in 500 kHz–1 MHz switching designs. |
| Commercial AC-DC Adapter Secondary Side | High-Frequency Inverter Freewheeling |
Use Scenario: Output rectification in compact wall adapters for IoT gateways and smart home hubs. IC Role / Device Role / Timing Role: Single Schottky diode converting transformer secondary AC to regulated DC output. Use Value: 1.0 A IF(AV) and 125 °C/W RθJA enable full-load operation without external heatsink on 2 oz. FR4. | Use Scenario: Clamp diode across IGBTs in motor drive inverters for HVAC and pump systems. IC Role / Device Role / Timing Role: Fast-recovery freewheeling element absorbing inductive kickback energy. Use Value: 40 A IFSM rating handles repetitive surge currents during PWM commutation without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS14-M3/5AT | Same 40 V VRRM and 1.0 A IF(AV), but VF = 0.52 V @ 1.0 A, 25 °C; larger SOD-123 package; no AEC-Q101 option | Higher conduction loss at room temperature; less suitable for thermally constrained automotive modules | Select SS14-M3/5AT only if legacy SOD-123 footprint compatibility is required and thermal margin is ample |
| SB140-TB | 40 V VRRM, 1.0 A IF(AV), VF = 0.55 V @ 1.0 A, 25 °C; TO-277A package; higher RθJA (~150 °C/W) | Higher thermal resistance and forward drop reduce efficiency in high-density layouts | Prefer SB140-TB only where through-hole or larger surface-mount mounting is mandated by mechanical constraints |
Compared with SS14-M3/5AT and SB140-TB, the SS1F4-M3/I delivers superior thermal performance (125 °C/W), lower VF at elevated temperature (0.37 V @ 125 °C), and optional AEC-Q101 qualification - making it optimal for space-constrained, high-efficiency automotive and industrial power stages.
Availability
SS1F4-M3/I is available at Aetrix Electronics and suitable for automotive polarity protection, industrial DC/DC converter output rectification, and commercial AC-DC adapter secondary-side applications requiring stable component supply and long-term lifecycle support.
Supply support for SS1F4-M3/I includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SS1F4-M3/I belongs to Vishay's eSMP® Series of ultra-low-profile Schottky rectifiers, designed specifically for high-density power conversion in automotive, industrial, and consumer electronics where thermal and space constraints are critical.
FAQ
What is the maximum junction temperature for SS1F4-M3/I under DC forward current?
The SS1F4-M3/I has a maximum junction temperature of 175 °C under DC forward current conditions, as confirmed in the Vishay datasheet Document Number 87729. This rating allows reliable operation in under-hood automotive environments and high-temperature industrial enclosures. The SS1F4-M3/I maintains stable electrical characteristics up to this limit when mounted on the recommended copper pad area per Figure 1 derating curve.
Is SS1F4-M3/I qualified for automotive applications?
The SS1F4-M3/I itself is not AEC-Q101 qualified; however, the automotive-grade variant SS1F4HM3/I is fully qualified per AEC-Q101. Both share identical electrical and thermal specifications, with HM3 denoting halogen-free, RoHS-compliant construction plus stress testing for automotive reliability. For automotive designs, SS1F4HM3/I is the recommended ordering option.
What does the "I" suffix mean in SS1F4-M3/I?
The "I" suffix in SS1F4-M3/I specifies the packaging configuration: 13-inch diameter plastic tape and reel, containing 10,000 units per reel. This contrasts with the "H" suffix (7-inch reel, 3,000 units), and both use the same M3 halogen-free, RoHS-compliant construction. The "I" format supports high-volume automated assembly lines requiring extended reel life.
What is the thermal resistance (RθJA) of SS1F4-M3/I on a standard PCB?
The SS1F4-M3/I exhibits a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W when mounted on a standard FR4 PCB with the recommended copper pad area, as measured per JEDEC test conditions. This value assumes 2 oz. copper and is critical for calculating allowable power dissipation in thermally constrained layouts without forced airflow or heatsinks.
Does SS1F4-M3/I have a defined pinout or polarity marking?
Yes - the SS1F4-M3/I uses a two-terminal SMF (DO-219AB) package with unambiguous polarity: a color band on the cathode end identifies the cathode terminal, while the opposite end is the anode. This marking is visible in top-view diagrams in the Vishay datasheet and aligns with industry-standard Schottky diode orientation for automated optical inspection and placement verification.
SS1F4-M3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-219AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 520 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 150 µA @ 40 V
- Capacitance @ Vr, F:
- 85pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
- Operating Temperature - Junction:
- 175°C (Max)
SS1F4-M3/I FAQ
1.How can I place an order for SS1F4-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SS1F4-M3/I on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SS1F4-M3/I reliable?
The price and inventory of SS1F4-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS1F4-M3/I is usually 5 days.
3.What payment methods are accepted for SS1F4-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS1F4-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS1F4-M3/I?
SS1F4-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS1F4-M3/I order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SS1F4-M3/I?
For technical support, including SS1F4-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS1F4-M3/I requirements.
6.How does Aetrix verify that SS1F4-M3/I is sourced from the original manufacturer or authorized distributors?
All SS1F4-M3/I products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SS1F4-M3/I meets industry standards.
7.What is the process for return or replacement of SS1F4-M3/I?
All SS1F4-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SS1F4-M3/I, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SS1F4-M3/I part is unused and in its original packaging.
Return procedure for SS1F4-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SS1F4-M3/I Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
